21209518

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{227}}^1$

素因数の和:408

約数の個数: 32

約数和(自身を含む): 36246528

約数和(自身を除く): 15037010

約数列:

[1, 2, 11, 22, 31, 62, 137, 227, 274, 341, 454, 682, 1507, 2497, 3014, 4247, 4994, 7037, 8494, 14074, 31099, 46717, 62198, 77407, 93434, 154814, 342089, 684178, 964069, 1928138, 10604759, 21209518]

約数ペア:

[(1, 21209518), (2, 10604759), (11, 1928138), (22, 964069), (31, 684178), (62, 342089), (137, 154814), (227, 93434), (274, 77407), (341, 62198), (454, 46717), (682, 31099), (1507, 14074), (2497, 8494), (3014, 7037), (4247, 4994)]